Reviewed-by: jiewen....@intel.com > -----Original Message----- > From: Yarlagadda, Satya P > Sent: Thursday, August 18, 2016 1:21 PM > To: edk2-devel@lists.01.org > Cc: Ma, Maurice <maurice...@intel.com>; Yao, Jiewen > <jiewen....@intel.com>; Mudusuru, Giri P <giri.p.mudus...@intel.com> > Subject: [PATCH] IntelFsp2Pkg: Add function to get FspInfoHeader before > stack is ready > > we need to locate the FSP Info Header before the stack is initialized to > access the cfg region for any UPD. Hence adding the > AsmGetFspInfoHeaderNoStack function to support it. > > Note: This function is there in IntelFspPkg but got removed in IntelFsp2Pkg > > Cc: Maurice Ma <maurice...@intel.com> > Cc: Jiewen Yao <jiewen....@intel.com> > Cc: Giri P Mudusuru <giri.p.mudus...@intel.com> > Contributed-under: TianoCore Contribution Agreement 1.0 > Signed-off-by: Satya Yarlagadda <satya.p.yarlaga...@intel.com> > --- > IntelFsp2Pkg/FspSecCore/Ia32/FspHelper.nasm | 11 +++++++++-- > 1 file changed, 9 insertions(+), 2 deletions(-) > > diff --git a/IntelFsp2Pkg/FspSecCore/Ia32/FspHelper.nasm > b/IntelFsp2Pkg/FspSecCore/Ia32/FspHelper.nasm > index 43eac97..a848dcb 100644 > --- a/IntelFsp2Pkg/FspSecCore/Ia32/FspHelper.nasm > +++ b/IntelFsp2Pkg/FspSecCore/Ia32/FspHelper.nasm > @@ -14,6 +14,8 @@ > SECTION .text > > global ASM_PFX(FspInfoHeaderRelativeOff) > +ASM_PFX(FspInfoHeaderRelativeOff): > + DD 0x12345678 ; This value must be patched by > the build script > > global ASM_PFX(AsmGetFspBaseAddress) > ASM_PFX(AsmGetFspBaseAddress): > @@ -29,6 +31,11 @@ ASM_PFX(NextInstruction): > pop eax > sub eax, ASM_PFX(NextInstruction) > add eax, ASM_PFX(AsmGetFspInfoHeader) > - DB 02Dh ; > opcode of sub eax, imm32 > -ASM_PFX(FspInfoHeaderRelativeOff): DD 0x12345678 ; sub > eax, FspInfoHeaderRelativeOff > + sub eax, dword [ASM_PFX(FspInfoHeaderRelativeOff)] > ret > + > +global ASM_PFX(AsmGetFspInfoHeaderNoStack) > +ASM_PFX(AsmGetFspInfoHeaderNoStack): > + mov eax, ASM_PFX(AsmGetFspInfoHeader) > + sub eax, dword [ASM_PFX(FspInfoHeaderRelativeOff)] > + jmp edi > -- > 2.9.2.windows.1
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